README

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| Building |
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To build all of diod's features, you need a few prerequisites:
lua, lua-devel (version 5.1 or better) [on debian/ubuntu liblua5.1-dev]
For /etc/diod.conf config file support.
munge, munge-libs, munge-devel
For MUNGE authentication support.
tcp_wrappers, tcp_wrappers-libs, tcp_wrappers-devel
For TCP wrapper support.
libcap, libcap-devel
Necessary for correct handling of supplemental groups when
server is running as root (DAC check is delegated to client).
Note: on Debian/Ubuntu, LUA requires the following configure flags:
./configure CPPFLAGS="-I/usr/include/lua5.1" --with-lua-suffix=5.1
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| Client Requirements |
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Diod is a user space server for the kernel v9fs client (9p.ko, 9pnet.ko).
Although the kernel client supports several 9P variants, diod only supports
9P2000.L, and only in its feature-complete form, as it appeared in 2.6.38.
Earlier versions of the kernel that do not support 9P2000.L will fail
at mount time when version negotiation fails. Some pre-2.6.38 versions
of the kernel that have 9P2000.L but still send some 9P2000.u ops may
fail in less obvious ways. Use a 2.6.38 or later kernel, or a v9fs
backport such as this one of 2.6.38.5's v9fs to RHEL6.1's 2.6.32 kernel.
git://github.com/garlick/9p-sac.git
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| Testing |
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Unit tests (make check):
./tests/misc
Miscellaneous unit tests.
Some tests will be skipped if not root.
Others will be skipped if valgrind is not installed.
./tests/user
User space client and user space server running across a socketpair.
Some tests will be skipped if not root.
Others will be skipped if you ARE root.
None require kernel 9p support.
./tests/kern:
Kernel space client and user space server running across a socketpair.
Tests will be skipped if 9p cannot be modprobed.
Running by hand for debugging:
Start diod server in foreground, with proto debug, no-auth, one export:
sudo ./diod -f -d 1 -n -e /tmp/9
Mount it:
sudo mount -t 9p -n 127.0.0.1 /mnt \
-oaname=/tmp/9,version=9p2000.L,uname=root,access=user
Or mount with diodmount:
sudo ./diodmount -n localhost:/tmp/9 /mnt
Or if diodmount is installed as /sbin/mount.diod:
sudo mount -t diod -n localhost:/tmp/9 /mnt
Running diod for I/O forwarding on clusters:
On I/O node, set up /etc/diod.conf accordign to diod.conf(5), then:
chkconfig diod on
service diod start
On compute node, if I/O node is fritz42, add entries like this to fstab
(assumes diodmount is installed as /sbin/mount.diod):
fritz42:/g/g0 /g/g0 diod default 0 0
...
Alternatively, use "zero-config" automounter method(*):
set DIOD_SERVERS="fritz42" in /etc/sysconfig/auto.diod
add to /etc/auto.master "/d /etc/auto.diod"
mkdir /d
chkconfig autofs on
service autofs start
ln -s /d/g.g0 /g/g0
...
Note that at this point diod is only being tested with NFS file systems.
Use it with Lustre or GPFS at your own peril - but if you do, please
report issues!
(*)only works on exports that are themselves mount points, see /etc/auto.diod
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| Support |
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Source access is on the github site:
https://github.com/chaos/diod
Wiki and issue tracker are on the google code site:
http://code.google.com/p/diod/
Diod can be discussed on the v9fs-users mailing list:
https://lists.sourceforge.net/lists/listinfo/v9fs-users